Clinton's support down 18 points in new poll
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Hillary ClintonHillary Diane Rodham ClintonChris Murphy’s profile rises with gun tragedies DNC, RNC step up cyber protections Gun proposal picks up GOP support MORE's support has dropped almost 20 percent, according to a new USA Today/Suffolk University poll, though she maintains a double-digit lead in the race for the Democratic presidential nomination. 

The former secretary of State has support from 41 percent of likely Democratic primary voters in the new poll, followed by Sen. Bernie SandersBernard (Bernie) SandersChris Murphy’s profile rises with gun tragedies Clip shows Larry David and Bernie Sanders reacting after discovering they're related For now, Trump dossier creates more questions than answers MORE (I-Vt.), with 23 percent, and Vice President Biden, at 20 percent. 
 
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The last USA Today/Suffolk survey in July found Clinton at 59 percent support, Sanders at 14 percent and Biden at 8 percent. Biden has since begun publicly mulling a White House bid.
 
Biden so far has not joined the race at this relatively late stage and is reportedly expected to skip the first Democratic debate hosted by CNN later this month. 
 
Clinton is now viewed unfavorably by 51 percent of likely voters, and 39 percent view her favorably. That's worse than in July, when the poll found those numbers at 43 percent to 47 percent.
 
Former Rhode Island Gov. Lincoln Chafee, former Virginia Sen. Jim Webb and former Maryland Gov. Martin O'Malley combine for less than 2 percent support in the latest poll. 
 
The survey of 430 Democrats was conducted Sept. 24–28 via phone with a margin of error of 5 points. The poll of 1,000 likely voters has a margin of error of 3 points.